> it's an issue for all block IO drivers that do IO completions from IRQ > context and that can do DMA - i.e. every block IO hardware that uses > interrupts. This includes SCSI too. In fact for SCSI it's a norm to have
I renew a question i asked earlier. To my understanding, on a SMP or hyperthreading system, disabling of IRQs is always local to one (virtual on HT) cpu. So would it be possible to get ultralow latency by simply hardlock all irqs and processes to cpu1 and the irq triggering the audiothread (together with the audiothread) to cpu 2 using the sched_affinity and irq-affinity capabilites of the kernel? This would be an easy to use lowlatency hardware patch for linux audio users with SMP/HT systems. Anybody knows? I'm currently thinking about getting a new system and consider a dualsystem if this worked. Ralf
